After having a few pending changes to the Chromium extension Reddit Imager for a few months, I finally got a chance to make some very minor but updates to this tool.
The simplest of the changes was adding a few extra strings to the matcher, so now imgur links using "gif" "png" or "jpeg" will match and show full size on Reddit.
The bigger, more important change was adding some naive support for imgur links that aren't direct links to images. Formerly, there were many links that were not supported by the tool. These were links to an "imgur page" that had advertisements and content, rather than just an image. Now, the reddit imager detects and relinks these so that the true image is shown full size, rather than just leaving the link alone.